package com.lml.springcloud.filter;

import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.time.LocalDateTime;

/**
 * @author luomingliang
 * @date 2020/5/19 22:47
 * 自定义过滤器,  关键实现两个接口 GlobalFilter, Ordered
 */
@Slf4j
@Component
public class MyLogGatewayFilter implements GlobalFilter, Ordered {


    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        log.info("****** come in MyLogGatewayFilter:"+ LocalDateTime.now());
        String uname = exchange.getRequest().getQueryParams().getFirst("uname");
        if (uname == null) {
            log.info("*****用户名为null,非法用户,o(╥﹏╥)o");
            exchange.getResponse().setStatusCode(HttpStatus.NOT_ACCEPTABLE);
            return exchange.getResponse().setComplete();
        }
        return chain.filter(exchange);
    }

    @Override
    public int getOrder() {
        //过滤器的执行顺序,数字越小越早执行
        return 0;
    }
}
